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A-20B

We produce this kind of Brown Aluminium Oxide grain normally used in blasting or polishing applications, such as removal of oil, grease, dirt, loose mill scale, lacquer kicking off, cloth grinding, glass blasting and other applications. Usually we call it blasting grade BFA sand.
Typical Chemical Analysis
Al2O3 Fe2O3 TiO2 SiO2

92.13%

 2.38% 2.98% 2.10%
Physical Properties
Color Dark brown
Shape Blocky, tough and sharp
Crystal Form Alpha-alumina trigonal system
True Specific Gravity
 3.96 g/cm3
Hardness
 2090 Knoop scale; 9.0 Mohs scale
Melting Temperature

About 2050 ℃
Grain Size Distribution
Loose grains.
Grit Sizes (F)
8 12 14 16 20 22 24 30 36 40 46 54
60 70 80 90 100 120 150 180 220 240 280 320
Bulk Density Test Value (g/cm3)
Grit No F12 F14 F16 F20 F24 F30 F36 F40 F46
B.D 1.79-1.87 1.76-1.84 1.74-1.82 1.72-1.80 1.70-1.78 1.68-1.76 1.66-1.74 1.63-1.71 1.61-1.69
Grit No F54 F60 F70 F80 F100 F120 F150 F180 F220
B.D 1.59-1.67 1.57-1.65 1.54-1.62 1.51-1.59 1.48-1.56 1.45-1.53 1.43-1.52 1.41-1.49 1.40-1.48